Psuke is gone forever.
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I know this has come up before but I can't remember where. I think there might be a single reference to the father in one of the books, and it wasn't the right skin color or something...
Baring that, its possible. Moe obviously had reasons to be wandering the world, if nothing else but being a messenger. He didn't spent all of his 30 years chillin' in Shimeh, and Mimara is plenty old/young enough to have been his child. Being that Esmi is somehow identifiable of being able to bare dunyain child, Moe would have certainly sought her out if he saw her (such women are rare?).
It would be odd, though, that he made a dunyain child and let her lose in the world with no further contact with either the child or the mother. Makes it seem like a mistake... Well, dunyain are prone to silly mistakes, it could be been an accident. Also, since Mim turned out fine without any instruction at all, I think its unlikely. All dunyain require extensive training to not go mad, per Kellhus' children and Moe only rearing 1. If it was an easy thing Moe would have had a brood of them running around, like Kel, but he decided to have 1 great one instead of a bunch of broken ones.